Annular radiation type blazed grating

Abstract

The invention relates to an annular radiation type blazed grating which comprises an annular grating baseplate, blazed grating teeth (3) and diffraction surfaces (4), wherein the blazed grating teeth (3) are etched on the annular grating baseplate, and the diffraction surfaces (4) are positioned at one side of notched ridge lines (2) of the blazed grating teeth. The annular radiation type blazed grating is characterized in that the blazed grating teeth (3) are periodically arranged on the circumference of the annular grating baseplate, each blazed grating tooth (3) is in a radiation type, the projection of the upper surface of the annular grating baseplate is fan-shaped, and the bottommost parts of scale marks on the blazed grating teeth (3) are positioned on a plane (6); the diffraction surfaces (4) of the blazed grating teeth (3) are larger planes on one side of the notched ridge lines (2); and a plane formed from straight lines (11) and (12) perpendicular to the notched ridge lines (2) of the blazed grating teeth and the plane (6) intersect at a straight line (13), the straight line (13) and each diffraction surface (4) form a blaze angle (14), and the blaze angle (14) is unchanged for each blazed grating tooth. Compared with the prior art, the annular radiation type blazed grating has the beam deflection performance which other round or annular blazed gratings do not have, and the annular radiation type blazed grating is convenient to manufacture and has the characteristic of high diffraction effect. On the aspect of economic benefit, the annular radiation type blazed grating can be widely applied to occasions needing beam deflection, spectral analysis and the like, particularly to the deflection of revolving beams.

Description

technical field [0001] The invention relates to the technical fields of spatial optical interconnection, binary optics and micro-optics, in particular to a novel grating structure. Background technique [0002] The application of grating technology provides a new platform for the development of modern sensing, optical focusing, beam deflection, spectral technology, etc., especially the invention of the blazed grating, which uses a certain angle between the groove surface of the blazed grating and the grating surface, so that The central main maximum of single groove surface diffraction is separated from the interference zero-order main maximum between multi-groove surfaces, and the light energy is transferred from the interference zero-order main maximum to a certain order of diffraction, so that the diffraction efficiency of the grating is significantly improved. [0003] At present, conventional blazed gratings, such as the gratings mentioned in patents CN200810069913.3 an...

AI Technical Summary

Problems solved by technology

[0005] At present, there is no ring grating whose grating groove teeth are distributed circumferentially and radially, which can deflect the incident light along the radial direction perpendicular to the ring

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